The invention relates to an injection device (1) comprising a housing (2) having an abutment surface (5) provided near a proximal end, said abutment surface extending at least partially around a perimeter of said housing and at least one engagement structure (6) provided at the abutment surface, wherein the injection device further comprises: a cap (7) provided with an opening (10) at a distal end (9) wherein a first lifting pole (11) is pivotally arranged within the cap, said first lifting pole being pivotally connected to the cap and being arranged to bear against the abutment surface in a fully attached position on the housing and wherein relative rotational movement between the cap and the housing around a longitudinal axis will cause a distal end of the first lifting pole to engage with the engagement structure thus causing axial displacement of the cap relative to the housing towards a detached position of the cap.本發明有關注射裝置(1),包括外殼(2),其具有被提供靠近一近側端的鄰接表面(5),該鄰接表面至少局部地延伸繞著該外殼之周邊,且至少一嚙合結構(6)被設在該鄰接表面,其中該注射裝置另包括:蓋子(7),在遠側端(9)設有開口(10);其中第一舉升支柱(11)係樞轉地配置在該蓋子內,該第一舉升支柱係樞轉地連接至該蓋子,且被配置成在該外殼上於完全附著位置中時支承抵靠著該鄰接表面;且其中該蓋子及該外殼之間環繞該縱長軸線的相對旋轉式移動,將造成該第一舉升支柱之遠側端與該嚙合結構嚙合,如此造成該蓋子相對該外殼之軸向位移朝該蓋子的分離位置。1‧‧‧注射器2‧‧‧外殼4‧‧‧近側端5‧‧‧鄰接表面6‧‧‧嚙合結構7‧‧‧蓋子8‧‧‧近側端9‧‧‧遠側端10‧‧‧開口11‧‧‧舉升支柱12‧‧‧舉升支柱13‧‧‧針護罩
